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- W4297384910 abstract "Abstract Background Sustained release of bioactive BMP2 (bone morphogenetic protein-2) is badly needed for bone regeneration, while the intrinsic short half-life of BMP2 at protein level cann’t meet the clinical need. In this study, we aimed to design Bmp2 mRNA-enriched engineered exosomes, which were then loaded into specific hydrogel to achieve sustained release for more efficient and safe bone regeneration. Results BMP2 mRNA was enriched into exosomes by selective inhibition of translation in donor cells, in which NoBody (non-annotated P-body dissociating polypeptide, a protein that inhibits mRNA translation) and modified engineered Bmp2 plasmids were co-transfected. The derived exosomes were named Exo BMP2+NoBody . In vitro experiments confirmed that Exo BMP2+NoBody had higher abundance of Bmp2 mRNA and thus stronger osteogenic induction capacity. When loaded into GelMA hydrogel via ally-L-glycine modified CP05 linker, the exosomes could be slowly released and thus ensure prolonged effect of BMP2 when endocytosed by the recipient cells. In the in vivo calvarial defect model, Exo BMP2+NoBody -loaded GelMA displayed great capacity in promoting bone regeneration. Conclusions the proposed Exo BMP2+NoBody -loaded GelMA can provide an efficient and innovative strategy for bone regeneration." @default.
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- W4297384910 date "2022-09-27" @default.
- W4297384910 modified "2023-10-17" @default.
- W4297384910 title "Hydrogel armed with Bmp2 mRNA-enriched exosomes enhances bone regeneration" @default.
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- W4297384910 doi "https://doi.org/10.21203/rs.3.rs-2088152/v1" @default.
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